Quasi-BIC metasurfaces enable rapid, localized singlet-oxygen generation

Ruilin Long; Laifu Lin; Xinwen Qi; Qiang Liu; Xing Fu

doi:10.1038/s41377-026-02267-9

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Quasi-BIC metasurfaces enable rapid, localized singlet-oxygen generation

Original Articles

- Quasi-BIC metasurfaces enable rapid, localized singlet-oxygen generation
- Light: Science & Applications Vol. 15, Issue 6, Pages: 2078-2088(2026)
- Affiliations：
  
  1.Department of Precision Instrument, Tsinghua University, Beijing 100084, China
  2.State Key Laboratory of Precision Space-Time Information Sensing Technology, Beijing 100084, China
  3.Key Laboratory of Photonic Control Technology, Ministry of Education, Tsinghua University, Beijing 100084, China
  4.Department of Chemistry, MOE Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing 100084, China
- Author bio：
  
  Qiang Liu (qiangliu@tsinghua.edu.cn)
  Xing Fu (fuxing@tsinghua.edu.cn)
- Funds：
- DOI：10.1038/s41377-026-02267-9
  CLC：
- Received：14 October 2025，
  
  Revised：2026-02-15，
  
  Accepted：02 March 2026，
  
  Online First：03 April 2026，
  
  Published：30 June 2026
- Accepted：
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Long, R. L. et al. Quasi-BIC metasurfaces enable rapid, localized singlet-oxygen generation. Light: Science & Applications, 15, 2078-2088 (2026).
DOI：

Long, R. L. et al. Quasi-BIC metasurfaces enable rapid, localized singlet-oxygen generation. Light: Science & Applications, 15, 2078-2088 (2026). DOI： 10.1038/s41377-026-02267-9.

摘要

Abstract

Bound states in the continuum (BIC) provide a photonic route to concentrate and store electromagnetic energy with minimal radiative leakage. Here

we report Au–TiO

metasurfaces that couple q-BIC optical resonance to interfacial charge transfer

enabling hot-carrier–mediated generation of

within subwavelength optical paths. Photonic engineering acts through two cooperative effects: (ⅰ) increased optical absorption that boosts hot-carrier generation at the Au/TiO

interface; a

nd (ⅱ) ultralow noble-metal loading that suppresses electron–hole recombination at metal/semiconductor junctions

thereby prolonging carrier lifetimes. These effects jointly yield a synergistic enhancement of

production beyond either pathway alone. Under continuous-wave excitation

the metasurfaces reach a local molar-level concentration of

within seconds

corresponding to an approximately six-order-of-magnitude increase in local

concentration compared with conventional approaches. Tuning structural asymmetry and excitation wavelength enables wavelength- and position-selective cytotoxicity without additional molecular sensitizers. By decoupling strong absorption from nobel-metal usage while extending hot-carrier persistence in a single platform

BIC-engineered metasurfaces offer a general way to achieve efficient photon-to-chemical conversion at solid–liquid interfaces. This approach is of significant value to rapid-acting photodynamic therapy

selective oxidation

and flow microreactors where low dose and geometric precision are critical.

关键词

Keywords

references

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